EP3416319A1 - Verfahren und vorrichtung zur informationsübertragung - Google Patents

Verfahren und vorrichtung zur informationsübertragung Download PDF

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Publication number
EP3416319A1
EP3416319A1 EP17759281.3A EP17759281A EP3416319A1 EP 3416319 A1 EP3416319 A1 EP 3416319A1 EP 17759281 A EP17759281 A EP 17759281A EP 3416319 A1 EP3416319 A1 EP 3416319A1
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EP
European Patent Office
Prior art keywords
symbol data
scrambling
scrambling sequence
layers
sequence
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP17759281.3A
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English (en)
French (fr)
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EP3416319B1 (de
EP3416319A4 (de
Inventor
Zhengwei Gong
Longbao WANG
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Huawei Technologies Co Ltd
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Huawei Technologies Co Ltd
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Priority claimed from PCT/CN2017/075524 external-priority patent/WO2017148430A1/zh
Publication of EP3416319A1 publication Critical patent/EP3416319A1/de
Publication of EP3416319A4 publication Critical patent/EP3416319A4/de
Application granted granted Critical
Publication of EP3416319B1 publication Critical patent/EP3416319B1/de
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/12—Wireless traffic scheduling
    • H04W72/1221—Wireless traffic scheduling based on age of data to be sent
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/0001—Arrangements for dividing the transmission path
    • H04L5/0003—Two-dimensional division
    • H04L5/0005—Time-frequency
    • H04L5/0007—Time-frequency the frequencies being orthogonal, e.g. OFDM(A), DMT
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L1/0078—Avoidance of errors by organising the transmitted data in a format specifically designed to deal with errors, e.g. location
    • H04L1/009—Avoidance of errors by organising the transmitted data in a format specifically designed to deal with errors, e.g. location arrangements specific to transmitters
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04J—MULTIPLEX COMMUNICATION
    • H04J99/00—Subject matter not provided for in other groups of this subclass
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L1/0001—Systems modifying transmission characteristics according to link quality, e.g. power backoff
    • H04L1/0009—Systems modifying transmission characteristics according to link quality, e.g. power backoff by adapting the channel coding
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L1/0001—Systems modifying transmission characteristics according to link quality, e.g. power backoff
    • H04L1/0033—Systems modifying transmission characteristics according to link quality, e.g. power backoff arrangements specific to the transmitter
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L1/0001—Systems modifying transmission characteristics according to link quality, e.g. power backoff
    • H04L1/0036—Systems modifying transmission characteristics according to link quality, e.g. power backoff arrangements specific to the receiver
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L1/0078—Avoidance of errors by organising the transmitted data in a format specifically designed to deal with errors, e.g. location
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L1/0078—Avoidance of errors by organising the transmitted data in a format specifically designed to deal with errors, e.g. location
    • H04L1/0091—Avoidance of errors by organising the transmitted data in a format specifically designed to deal with errors, e.g. location arrangements specific to receivers, e.g. format detection
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L1/02—Arrangements for detecting or preventing errors in the information received by diversity reception
    • H04L1/06—Arrangements for detecting or preventing errors in the information received by diversity reception using space diversity
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L1/02—Arrangements for detecting or preventing errors in the information received by diversity reception
    • H04L1/06—Arrangements for detecting or preventing errors in the information received by diversity reception using space diversity
    • H04L1/0618—Space-time coding
    • H04L1/0637—Properties of the code
    • H04L1/0668—Orthogonal systems, e.g. using Alamouti codes
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L27/00—Modulated-carrier systems
    • H04L27/32—Carrier systems characterised by combinations of two or more of the types covered by groups H04L27/02, H04L27/10, H04L27/18 or H04L27/26
    • H04L27/34—Amplitude- and phase-modulated carrier systems, e.g. quadrature-amplitude modulated carrier systems
    • H04L27/3488—Multiresolution systems
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/003—Arrangements for allocating sub-channels of the transmission path
    • H04L5/0037—Inter-user or inter-terminal allocation

Definitions

  • a transmit end may superimpose, on a time-frequency resource of a system, at least two data streams that need to be sent and that are of a plurality of users for near-far matching, and then send the at least two data streams.
  • NOMA Non orthogonal multi-access
  • independent encoding, modulation, and hierarchical mapping are performed on different layers of data of at least two users, different power allocation coefficients are allocated to the different layers of data, and the data is superimposed based on the power allocation coefficients and a signal is output.
  • a receive side may alternatively implement multiuser demodulation through power allocation between a plurality of users.
  • such a multiple access technology can implement multiuser detection based on only power allocation, leading to a limited application scenario and system performance gain. Especially for non-near-far users, performance of such a NOMA multiple access manner cannot be maximized.
  • a plurality of layers of signals of the at least one terminal device are separately modulated, linear processing is performed, on the target resource, on each of the N layers of modulated signals, the obtained linear processing signals are superimposed to obtain the superimposed output signal, and the superimposed output signal may be sent to the terminal device.
  • the information transmission method can improve a system performance gain.
  • the information transmission method may be applied to a multiple access system, including an orthogonal multiple access system and a non-orthogonal multiple access system.
  • the system may include a receive end and a transmit end.
  • the information transmission method may be performed by the transmit end.
  • the transmit end may be a network side device.
  • the transmit end may be a base station.
  • the "target” in the “target resource” in this embodiment of the present invention indicates a resource that is aimed at in descriptions in the embodiments, and does not imply a choice.
  • the target resource may be a resource in actual transmission. This is not limited herein.
  • Linear processing coefficients on different resources may be a permutation combination of ⁇ i when different values are assigned to i.
  • one vector may alternatively be selected, in the following manner, from the M vectors as the row vector corresponding to the j th resource: predefining a vector ⁇ , where ⁇ includes the N elements in the row vector, and determining, based on a relationship between the vector ⁇ and the resource number j, the row vector ⁇ j corresponding to the j th resource.
  • the M vectors obtained by using the N elements are denoted as ⁇ 1 , ⁇ 2 , ..., and ⁇ M
  • determining N layers of data of the at least one terminal device may be implemented in the following manner: obtaining at least one transport block (Transmission Block, TB) of the at least one terminal device, and performing serial-to-parallel conversion on data obtained after the at least one transport block is encoded, to obtain the N layers of data.
  • Transport Block Transmission Block
  • the two terminal devices When an absolute value of a difference between channel quality of two terminal devices is greater than or equal to the channel quality threshold, the two terminal devices are considered as near-far matching users. When an absolute value of a difference between channel quality of two terminal devices is less than the channel quality threshold, the two terminal devices may be considered as non-near-far matching users.
  • This embodiment of the present invention may be not limited to distances of terminal devices.
  • the network side device may further send, to the terminal device, a quantity N of layers of the data, a modulation and coding scheme (Modulation and Encoding Strategy, MCS) for each layer of data, a layer number i of the data that is obtained by using a transport block of the terminal device, so that after receiving a signal from the network side device, the terminal device decodes the received signal based on N, the MCS, and i.
  • MCS Modulation and Encoding Strategy
  • a method used by the terminal device to decode the received signal based on N, the MCS, and i may be performed according to a method in the prior art.
  • an information transmission method includes: receiving, by using a target resource, a superimposed output signal from a network side device, where the superimposed output signal is a sum of each of N layers of modulated signals multiplied by a linear processing coefficient corresponding to the layer, the linear processing coefficient is a complex number, and N is a positive integer greater than or equal to 2; and demodulating the superimposed output signal based on the linear processing coefficient of each layer of modulated signals.
  • the demodulating the superimposed output signal based on the linear processing coefficient of each layer of modulated signals includes: demodulating the superimposed output signal based on the linear processing coefficient of each layer of modulated signals or based on the corresponding linear processing coefficient and a corresponding power allocation coefficient.
  • the method is performed by at least a first terminal device and a second terminal device.
  • An absolute value of a difference between channel quality of the first terminal device and channel quality of the second terminal device is less than a channel quality threshold, where the channel quality threshold is a positive integer.
  • linear processing coefficients of a same layer of modulated signals on different resources may be the same or different.
  • an information transmission apparatus includes: an obtaining unit, configured to obtain N layers of modulated signals that need to be transmitted to at least one terminal device, where N is a positive integer greater than or equal to 2; a processing unit, configured to: multiply, on a target resource, each layer of modulated signals, obtained by the obtaining unit, by a linear processing coefficient corresponding to the layer, to obtain each layer of linear processing signals, and add all layers of linear processing signals up, to obtain a superimposed output signal, where the linear processing coefficient is a complex number; and a sending unit, configured to send, by using the target resource, the superimposed output signal obtained by the processing unit to the at least one terminal device.
  • the apparatus in another implementation of the fourth aspect, includes at least a first terminal device and a second terminal device.
  • An absolute value of a difference between channel quality of the first terminal device and channel quality of the second terminal device is less than a channel quality threshold, where the channel quality threshold is a positive integer.
  • the information transmission apparatus may be configured to perform the method according to the second aspect or any possible implementation of the second aspect.
  • the apparatus includes the units configured to perform the method according to the second aspect or any possible implementation of the second aspect.
  • the information transmission method in the embodiments of the present invention may be applied to a soft multiplexing multiple access (Soft Multiplexing Multiple Access, SMMA) technology.
  • SMMA Soft Multiplexing Multiple Access
  • the SMMA technology may be understood as that when information is being transmitted, after data is modulated and mapped, linear processing is performed on different layers of data on different resources, so that a probability distribution of an amplitude or a phase of a superimposed output signal obtained after all layers of linear processing signals on a same resource are superimposed satisfies a Gaussian distribution.
  • SMMA Soft Multiplexing Multiple Access
  • an operation of performing linear processing on modulated signals is added, so that the probability distribution of the amplitude or the phase of the superimposed output signal obtained after all the layers of linear processing signals on a same resource are superimposed satisfies the Gaussian distribution, thereby improving a system performance gain.
  • linear processing includes linear processing performed on the modulated signals based on the power allocation coefficient. In this way, it can be ensured that near-far matching users are no longer limited to a user matching scenario. That is, in the SMMA technology, no limit is imposed on the channel quality of the terminal device, and any terminal device can use the SMMA technology to transmit information.
  • an information transmission system includes the information transmission apparatus according to the third aspect and the information transmission apparatus according to the fourth aspect.
  • scrambling processing is performed on each layer of symbol data sequence, a scrambled signal is obtained based on a processing result, and the scrambled signal is sent to another device, so that the another device demodulates the scrambled signal.
  • Such an information transmission method in which multiuser detection is implemented based on scrambling processing can improve a system performance gain.
  • the performing, by the first device, scrambling processing on each of the N layers of symbol data sequences includes: determining, by the first device, a scrambling sequence corresponding to each layer of symbol data sequence; and multiplying, by the first device, a scrambling coefficient in the scrambling sequence by symbol data in a corresponding symbol data sequence.
  • the determining, by the first device, a scrambling sequence corresponding to each layer of symbol data sequence includes: determining N scrambling sequence selection indexes based on a quantity N of layers of the symbol data sequences, where each layer of symbol data sequence corresponds to one scrambling sequence selection index, and each scrambling sequence selection index corresponds to one scrambling sequence; and selecting, from a predefined scrambling sequence set, a scrambling sequence corresponding to each scrambling sequence selection index.
  • the plurality of layers of symbol data sequences correspond to a same scrambling sequence.
  • another dimension for example, a power dimension, needs to be added to distinguish different layers of symbol data sequences.
  • scrambling processing is performed on each layer of symbol data sequence, a scrambled signal is obtained based on a processing result, and the scrambled signal is sent to another device, so that the another device demodulates the scrambled signal.
  • Such an information transmission method in which multiuser detection is implemented based on scrambling processing can improve a system performance gain.
  • the apparatus further includes a second obtaining unit.
  • the second obtaining unit is specifically configured to obtain a base sequence having a length of P, where P is a positive integer, and P ⁇ 2.
  • Each row in the scrambling matrix constitutes one scrambling sequence, a set constituted by P scrambling sequences is the scrambling sequence set, and selection indexes of the P scrambling sequences are integers from 0 to P-1.
  • an information transmission apparatus including: a first receiving unit, configured to receive a scrambled signal from a first device, where the scrambled signal is obtained by the first device by performing scrambling processing on each of obtained N layers of symbol data sequences, and N is a positive integer; and a demodulation unit, configured to demodulate the scrambled signal received by the first receiving unit.
  • the information transmission apparatus may be configured to perform the method according to the seventh aspect or any possible implementation of the seventh aspect.
  • the apparatus includes the units configured to perform the method according to the seventh aspect or any possible implementation of the seventh aspect.
  • Beneficial effects of the units also correspond to beneficial effects of corresponding steps in the seventh aspect. To avoid repetition, details are not described herein again.
  • a multi-carrier transmission system using a non-orthogonal multiple access technology for example, an orthogonal frequency division multiplexing (Orthogonal Frequency Division Multiplexing, OFDM) system, a filter bank multi-carrier (Filter Bank Multi-Carrier, FBMC) system, a generalized frequency division multiplexing (Generalized Frequency Division Multiplexing, GFDM) system, and a filtered orthogonal frequency division multiplexing (Filtered-OFDM, F-OFDM) system using the non-orthogonal multiple access technology.
  • OFDM Orthogonal Frequency Division Multiplexing
  • FBMC filter bank multi-carrier
  • GFDM Generalized Frequency Division Multiplexing
  • Filtered-OFDM, F-OFDM filtered orthogonal frequency division multiplexing
  • the embodiments of the present invention may be applicable to information transmission in a plurality of communications scenarios, such as device to device (Device to Device, D2D) information transmission, machine to machine (Machine to Machine, M2M) information transmission, or information transmission in a macro/micro communications scenario.
  • D2D Device to Device
  • M2M Machine to Machine
  • a base station may communicate with a plurality of UEs over an air interface by using a non-orthogonal multiple access technology.
  • the plurality of UEs may use a same time-frequency resource.
  • a plurality of codewords are allowed to be superimposed and transmitted on one resource.
  • One resource may be defined as a resource element that is jointly defined in at least two dimensions such as a symbol in a time domain, a subcarrier in a frequency domain, and an antenna port in a spatial domain.
  • the base station may determine the N layers of modulated signals, where N is a total quantity of layers of transmitted data, and N is a positive integer greater than or equal to 2. For example, N may be obtained based on information reported by a terminal device to the base station.
  • the N layers of modulated signals may be for a same terminal device, or may be for a plurality of terminal devices.
  • the modulated signals are obtained through modulation and mapping after encoding and serial-to-parallel conversion are performed on a transport block of the terminal device.
  • the N layers of modulated signals may be obtained through modulation and mapping after serial-to-parallel conversion is performed on transport blocks of a same terminal device, or may be obtained through modulation and mapping after serial-to-parallel conversion is performed on transport blocks of different terminal devices.
  • the base station may process and superimpose different layers of modulated signals based on only the linear processing coefficient, to obtain the superimposed output signal.
  • the base station may process and superimpose different layers of modulated signals based on the linear processing coefficient and the power allocation coefficient, to obtain the superimposed output signal.
  • distances of different terminal devices may be no longer limited by adding a power allocation coefficient.
  • the base station may send the superimposed output signal to the terminal device.
  • the base station may send, to the terminal device on each resource, superimposed output signals obtained when all layers of signals are transmitted.
  • the superimposed output signal may be sent only to the terminal device.
  • the terminal device may demodulate each superimposed output signal based on linear processing coefficients of each of the N layers of modulated signals on different resources.
  • the linear processing coefficient corresponds to a target resource.
  • a plurality of layers of signals of the at least one terminal device are separately modulated, linear processing is performed, on the target resource, on each of the N layers of modulated signals, the obtained linear processing signals are superimposed to obtain the superimposed output signal, and the superimposed output signal may be sent to the terminal device.
  • the information transmission method can improve a system performance gain.
  • a base station may obtain at least one transport block that needs to be transmitted to a terminal device. It should be understood that herein, there may be one or more transport blocks.
  • the base station may encode the obtained transport block, to obtain an encoded transport block.
  • the base station may perform serial-to-parallel conversion on the encoded data, to obtain a plurality of layers of parallel data.
  • Two layers of data are used in FIG. 3 as an example for description. Linear processing manners of the layers of data are similar, and details are not described herein.
  • the base station may perform linear processing on all modulated signals of the i th layer of data on the j th resource, for example, so that each modulated signal is multiplied by a linear processing coefficient, to obtain linear processing signals of the i th layer of data on the j th resource.
  • the base station may first obtain linear processing coefficients of the i th layer of data on the j th resource, and then perform linear processing on the modulated signals separately based on the linear processing coefficients.
  • the base station may first obtain power allocation coefficients of different layers of data, and then allocate, based on the power allocation coefficients, power allocation coefficients to different layers of linear processing signals.
  • the base station may determine the output signal based on the power allocation coefficients and the linear processing signals. Output signals on a same resource may be a superimposed output signal obtained after linear processing and superimposition are performed on all layers of modulated signals on the resource. For example, the base station may determine, based on a power allocation coefficient of the i th layer of data on the j th resource and linear processing signals of the i th layer of data on the j th resource, a superimposed output signal obtained when all layers of data are transmitted on the j th resource, and send the superimposed output signal to the terminal device.
  • Aprobability distribution of amplitudes or phases of a plurality of superimposed output signals obtained for different modulation channels should satisfy a Gaussian distribution. In this way, the superimposed output signals on a same resource can obtain a shaping gain, thereby improving a system performance gain.
  • step 104 For a specific execution method for demodulating the received superimposed output signal by the terminal device in step 208, refer to step 104. To avoid repetition, details are not described herein again.
  • the receiving unit 21 is configured to receive, by using a target resource, a superimposed output signal from a network side device.
  • the superimposed output signal is a sum of each of N layers of modulated signals multiplied by a linear processing coefficient corresponding to the layer.
  • the linear processing coefficient is a complex number, and N is a positive integer greater than or equal to 2.
  • the demodulation unit 22 is configured to demodulate, based on the linear processing coefficient of each layer of modulated signals, the superimposed output signal obtained by the receiving unit.
  • the terminal device in this embodiment of the present invention may receive the superimposed output signal from the network side device, and demodulate the superimposed output signal.
  • the linear processing coefficient of the superimposed output signal is a complex number. In this way, a system performance gain can be improved.
  • the components of the apparatus 30, such as the transmitter 31, the processor 32, and the memory 33, may be coupled together by using a bus system 34.
  • the bus system 34 may further include a power bus, a control bus, a status signal bus, and the like.
  • various types of buses in the figure are marked as the bus system.
  • the memory 33 may include a read-only memory and a random access memory, and provide an instruction and data to the processor 32.
  • a part of the memory 33 may further include a nonvolatile random access memory.
  • the memory 33 may store aggregation configuration information.
  • the processor 32 may be configured to execute the instruction stored in the memory. When executing the instruction, the processor may perform the corresponding procedure of the corresponding apparatus in FIG. 2 and FIG. 3 in the foregoing method embodiments. For brevity, details are not described herein again.
  • the processor 42 may demodulate M superimposed output signals.
  • the first device When N>1, the first device performs scrambling processing on each of the N layers of symbol data sequences, to obtain a scrambled symbol data signal corresponding to each layer; and superimposes the N layers of scrambled symbol data signals to obtain the scrambled signal.
  • the scrambling sequence set may be a scrambling matrix constituted by Q sequences that are obtained by performing full permutation on elements in a base sequence having a length of P.
  • the first device may obtain a base sequence having a length of P, and perform full permutation on elements in the base sequence, to obtain Q sequences.
  • the Q sequences construct a scrambling matrix of P rows and Q columns, where P is a positive integer, and P ⁇ 2. Each row in the scrambling matrix constitutes one scrambling sequence. For the P rows, there are a total of P scrambling sequences.
  • a set constituted by the P scrambling sequences is the scrambling sequence set, and selection indexes of the P scrambling sequences are integers from 0 to P-1.
  • a row vector of the scrambling matrix is used as a scrambling sequence.
  • the P*Q scrambling matrix corresponds to a scrambling sequence set whose size is P.
  • Each scrambling sequence has a length of Q.
  • the index of the symbol data sequences may be determined by using the scrambling sequence and the coefficient selection index of the scrambling sequence.
  • the coefficient selection index of the scrambling sequence is used to indicate the scrambling coefficient in the scrambling sequence, and the index of the symbol data sequences is used to indicate the symbol data in the symbol data sequence.
  • the second device may determine the quantity N of superimposed layers in the following manner: The second device may receive, from the first device, the quantity N of superimposed layers of the symbol data sequences. Alternatively, the second device may obtain a predefined maximum quantity of superimposed layers, and use the maximum quantity of superimposed layers as the quantity N of superimposed layers of the symbol data sequences.
  • the scrambling sequence selection index in this embodiment of the present invention may be determined by the base station and scheduled to the UE.
  • the base station may determine the N scrambling sequence selection indexes and send the N scrambling sequence selection indexes to the UE.
  • Each layer of symbol data sequence corresponds to one scrambling sequence selection index, and a corresponding scrambling sequence can be found by using the scrambling sequence selection index.
  • scrambling processing is performed on each layer of symbol data sequence, a scrambled signal is obtained based on a processing result, and the scrambled signal is sent to another device, so that the another device demodulates the scrambled signal.
  • Such an information transmission method in which multiuser detection is implemented based on scrambling processing can improve a system performance gain.
  • This embodiment of the present invention implements multiuser detection based on scrambling processing, and imposes no limit on distances of users. In this way, an application scenario of a multiple access technology can be enlarged while improving a system performance, without being limited to near-far matching users.
  • FIG. 9 is a block diagram of an information transmission apparatus according to an embodiment of the present invention.
  • the apparatus 50 in FIG. 9 may be the first device in the method procedure in FIG. 8 , may be a network side device such as a base station, or may be a terminal device.
  • the apparatus 50 may include a first obtaining unit 51, a processing unit 52, and a sending unit 53.
  • the first obtaining unit 51 is configured to obtain N layers of symbol data signals, where N is a positive integer.
  • the sending unit 53 is configured to send the scrambled signal to a second device.
  • the first receiving unit 61 is configured to receive a scrambled signal from a first device.
  • the scrambled signal is obtained by the first device by performing scrambling processing on each of obtained N layers of symbol data sequences, and N is a positive integer.
  • the demodulation unit 62 is configured to demodulate the scrambled signal received by the first receiving unit.
  • scrambling processing is performed on each layer of symbol data sequence, a scrambled signal is obtained based on a processing result, and the scrambled signal is sent to another device, so that the another device demodulates the scrambled signal.
  • Such an information transmission method in which multiuser detection is implemented based on scrambling processing can improve a system performance gain.
  • the processor 72 is configured to obtain N layers of symbol data signals, and perform scrambling processing on each of the N layers of symbol data sequences, to obtain a scrambled signal, where N is a positive integer.
  • the components of the apparatus 70 may be coupled together by using a bus system 74.
  • the bus system 74 may further include a power bus, a control bus, a status signal bus, and the like.
  • various types of buses in the figure are marked as the bus system.
  • the memory 73 may include a read-only memory and a random access memory, and provide an instruction and data to the processor 72.
  • a part of the memory 73 may further include a nonvolatile random access memory.
  • the memory 73 may store aggregation configuration information.
  • the processor 42 may be configured to execute the instruction stored in the memory. When executing the instruction, the processor may perform the corresponding procedures of the first device in FIG. 7 in the foregoing method embodiment. For brevity, details are not described herein again.
  • the information transmission apparatus 70 in this embodiment of the present invention may correspond to the first device in the information transmission method in the embodiments of the present invention.
  • the foregoing and other operations or functions of the units/modules in the apparatus 70 are respectively intended to implement corresponding procedures of the first device in the method flowchart FIG. 7 .
  • details are not described herein again.
  • FIG. 12 is a block diagram of an information transmission apparatus according to another embodiment of the embodiments of the present invention.
  • the apparatus 80 in FIG. 12 may be the second device in the method embodiment in FIG. 7 .
  • the apparatus 80 may include a receiver 81, a processor 82, and a memory 83.
  • the processor 82 is configured to demodulate the received scrambled signal.
  • scrambling processing is performed on each layer of symbol data sequence, a scrambled signal is obtained based on a processing result, and the scrambled signal is sent to another device, so that the another device demodulates the scrambled signal.
  • Such an information transmission method in which multiuser detection is implemented based on scrambling processing can improve a system performance gain.
  • the components of the apparatus 80 may be coupled together by using a bus system 84.
  • the bus system 84 may further include a power bus, a control bus, a status signal bus, and the like.
  • various types of buses in the figure are marked as the bus system.
  • the memory 83 may include a read-only memory and a random access memory, and provide an instruction and data to the processor 82.
  • a part of the memory 83 may further include a nonvolatile random access memory.
  • the memory 83 may store aggregation configuration information.
  • the processor 82 may be configured to execute the instruction stored in the memory. When executing the instruction, the processor may perform the corresponding procedures of the second device in FIG. 7 in the foregoing method embodiments. For brevity, details are not described herein again.
  • the information transmission apparatus 80 in this embodiment of the present invention may correspond to the second device in the information transmission method in the embodiments of the present invention.
  • the foregoing and other operations or functions of the units/modules in the apparatus 80 are respectively intended to implement corresponding procedures of the second device in the method flowchart FIG. 7 .
  • details are not described herein again.
  • Methods or steps described in the embodiments disclosed in this specification may be implemented by hardware, a software program executed by a linear processor, or a combination thereof.
  • the software program may reside in a random access memory (RAM), a memory, a read-only memory (ROM), an electrically programmable ROM, an electrically erasable programmable ROM, a register, a hard disk, a removable disk, a CD-ROM, or any other form of storage medium known in the art.

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CN107154833A (zh) 2017-09-12
EP3416319A4 (de) 2019-02-20

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